<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<title></title>
	<link rel="stylesheet" href="">
</head>
<style>
	.claer {
		clear: both;
		height: 0;
		min-height: 0;
		font-size: 0;
	}
	.box {
		clear: both;
		content: '';
		display: block;
		width: 0;
		height: 0;
		visibility: hidden;
	}
	.box {
		/*处理兼容性问题*/
		zoom: 1; 
	}
</style>
<body>
	<div class="box">
		<div class="div1"></div>
		<div class="div1"></div>
		<div class="div1"></div>
		<div class="clear"></div>
	</div>				
</body>
</html>